Reinforce-bar for concrete floors and beams.



PATENTED OUT. 9, 1906.

J. BABIGZKY. REINFORGE BAR FOR CONCRETE FLOORS AND BEAMS.

APPLICATION FILED 00121. 1905.

- mr/vfssts:

JOSEPH BABICZKY, OF-KANSAS GliiY, MISSOURI.

REENFQRCE BAR FOR CONCRETE FLOQHS AND EEAEW$H Specification of Letters Patent.

racemes Oct. 9, 1906.

W Application filed October 21. 1905. Serial No. 283.749.

To all whom 'it may concern.-

Be it known that I, JOSEPH BABIoZKY, a .citi zen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Reinforce-Bars for Concrete Floors and Beams, of which the f 01 lowing is a specification.-

This invention relates to concrete rein forcement bars,-and more especially to such bars for use in connection with floors and beams; and my object is to produce a device of the character named which will interlock with the concrete to guard against slippage.

A further object is to produce such a bar which will not only guard against slippage, but will take up the tensile stresses caused by moments and combined horizontal and vertical shears.

A still further object is to produce a bar of this character of uniform cross-sectional area and which can be transformed into a trussed bar easily, quickl and cheaply.

To these ends the invention consists in cer tain novel and peculiar features of construction andcombination of parts, as hereinafter described and claimed, and in order that it may be fully understood reference is tobe had to the accompanying drawings, in which Figure 1 is a top, plan view of a harembodying'my invention. Fig. 2 is aside view of the same. Fig. 3 is an enlarged side view of a portion of the bar equip ed with a trussarm. Fig. 4 is a plan View 0 the same. Fig. 5 is an enlarged side view of a portion of the 'bar with a truss-arm of modified form. Fig.

Sis a plan view of the same. Fig. 7 is a side view of another modification" of the trussarm. Fig. 8 is a plan view of the same.

, Fig. 9 is.a cross-section on the line IX IX of Fig, 1

Fig. 10 is a cross section on line X X of Fig. 1.

Referring to the drawings in detail, 1 indicates a bar originallyof rectangular {crosssectional form from end to end, by preference,

and rolled or pressed to form a'corrugatedv bar of uniform cross-sectional area;

corrugated or depressed portions 2 conform tothe arc of circles and are in the sidesfof the bar. At opposite oints and intermediate The of the webs being centrally-of the recesses. from which points they taper toward and merge in' compound curve lines into the bar, where its original form remains undisturbed.

In floor construction the bars extend transversely embedded in the concrete, which enters the corrugations, and between those portions of the ribs which project upwardly and downwardly from the upper and lower sides of the bars. As a result of this relation the bars are interlocked with the concrete and have no movement independ ent thereof. 1

For use with concrete beams the bars are transformed into trussed bars to properly resist the stresses caused by combined horizontal and vertical shears. Accordingly as the character of the structure or the relative proportio s of the beams vary the stresses caused by moi ents pr shears will usually be unequal, and to accommodate this state of affairs the reinforcements against stresses caused by moments and shears must be rigidly connected.

To'produce an efficient trussed corrugated tached to the bar at the factory or may be at tached under the supervision of the contractor in charge of the concrete-work to which.

they are to be applied. If applied at the factory, it is desirable that auxiliary securing means be employed to guard against loosening of the arms; but if applied at the site of.

the structure such auxiliary means may be dispensed with, and in this connectioh it is to be noted that the last method is to be preferred, because the architect or engineer in charge is enabled to give the contractor specific instructions as to how many truss-arms are needed and how they shall be spaced on the bars, as at times it may be necessary to apply the truss-arms at all corrugated points a bar and at other times to apply them at p a onl1yhpredetermined corrugated points;

e arms are preferably'of cylindrical form, though o'ssibly of variable gage and length, and in t e preferred type bent to provide the armsproper, 4:, and opp0sitelyopening halfloops disposed at opposite-sides of the bar the arms of a truss is universal.

and of the Vertical plane occupied by the arms, one half-loop lying in the same inclined plane as the arm and the other diverging upwardly therefrom toward the center of the bar, it being understood from this last statement that the arms nearest a particular-end of a bar extend upwardly and outwardly with respect to said bar and that the two sets of arms therefore diverge upwardly. Only one set of arms are shown, as the divergence of The halfloop in the same inclined plane as its arm 4 comprises an end portion 5, projecting laterally from the lower end of the arm and binding on the concave surface of the bar at the outer end of a web 3, the side portion 6 and the end portion 7 projecting from the lower end of the side portion 6 and binding against the under side of said web inward of its'portion of greatest depth, said end portion extending to the opposite side of the bar, so as to also form the lower endportion of the second half-loop, the side portion 8 of the latter extending upward and inward to the top of the bar. The upper end 9 of the second halfloop extends across the bar and binds thereon in the concave surface at the inner end of said web and terminates at the side of the bar occu iedby the first-named half-loop in a depen ing arm 10, so as to cooperate with side portions 6 and 8 in guarding against lateral movement of-the truss-arm.

To insure greater rigidity of the truss-arm, particularly where the bar is equipped therewith and so shipped from the factory, a tiewire 11 may be bound around the bar and .armoutward of the web, as shown, or in any other suitable or preferred manner.

In the modified construction shown by Figs. 5 and 6 the second half-loop i disposed in approximately the same incline plane as .its companion, the side portion and upper end of such second half-loop being numbered 12 and 13, respectively, the said, end 13 being coiled around the lower portion of the arm,

as at 14. In this type of construction the and that the principle of construction is thereconnection may be rendered more rigid by the employment of a tie-Wire 15.

The construction shown by Figs. 7 and'8 is substantially the same as in the two preceding figures, except that the end 13 terminates in a hook 16 for convenience in attaching the tie-Wires 17. In all three t es it Will be noticed that there are two ha f-loops employed fore the same.

,In practice the trussed barswill extendlongitudinall of and .be embedded in the beam, with t e arms projecting upward into the body of the floor and maintaining their rigid relation with the bar because of peculiarities of construction of both the bar and the arms.

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a bar. corrugated to produce a part of reduced Width and increased depth or thickness-hit one or more points of a truss-arm roj ecting upward from the bar and outward toward its contiguous end and provided atits lower end with a loop engaging the bar at the points of-reduced width and increased depth with at least one half-loop having its side portion extending diagonally of one of the corrugated points, and its ends engaging the top and bottom of the bar.

1 2. The combination With a bar corrugated to prod lpe a part of reduced width and in creased epth of thickness at one or more points, saidcorrugated reduced portion being of greatest depth and least thickness at its middle and diminishing in depth and increasing in width toward its ends, of a truss-.

arm projecting upward from the bar and outward toward its contiguous end and provided at its lower end with a loop engaging the bar at the points of reduced width and increased depth with at least one half-loop having its side portion extending diagonally of one of the corrugated points and its ends engaging the top and'bottom of the bar.

3. The combination with a bar corrugated to produce a bar of reduced width and increased depth at one or more points, of a truss-arm projecting upward from thebar and having its lower end formed into a pair of half-loops engaging the bar at opposite sides at its points of reduced Width and increased depth.

4. The combination with a bar corrugated to produce a bar of reduced Width and in creased depth at one or more'points, of a' truss-arm projecting upward from the bar and provided at its lower end with a pair of half-loops embracing the bar at opposite sides at its points of reduced width and increased depth, and tie-wires secured to said 'arm and passed around the bar.

5. The combination with a corrugated bar, of a truss provided at its lower end with a half-loop embracing the bar at opposite sides of the web of one of the corrugations.

6. The combination with a corrugated bar, of a truss-arm provided at its lower end with a pair of divergent half-loops encircling.

the bar and engaging the opposite faces of the same at opposite sides of one of the corru ations. j

n testimpny whereof'I affix my signature in the presence of two witnesses.

JOSEPH BABICZKY. 

